One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,8)(5,6)(17,18,22,28)(19,29,32,24)(20,34,37,26)(21,27,23,39)(25,38,44,36)(30,41,35,45)(31,46,33,42)(40,47,43,48)(2,6)(4,7)(9,10)(11,15)(12,14)(13,16)(17,19,22,32)(18,24,28,29)(20,35,37,30)(21,31,23,33)(25,43,44,40)(26,45,34,41)(27,42,39,46)(36,48,38,47)(1,3,5,8)(2,7,6,4)(9,11)(10,13)(12,16)(14,15)(17,20)(18,25)(19,30)(21,36)(22,37)(23,38)(24,40)(26,27)(28,44)(29,43)(31,47)(32,35)(33,48)(34,39)(41,42)(45,46)(2,6)(3,8)(11,16)(13,15)(17,20)(18,26)(19,30)(21,38)(22,37)(23,36)(24,41)(25,27)(28,34)(29,45)(31,48)(32,35)(33,47)(39,44)(40,42)(43,46) involution — undirected(1,4,5,7)(2,8,6,3)(10,14)(13,15)(17,21,22,23)(18,27,28,39)(19,31,32,33)(20,36,37,38)(24,42,29,46)(25,26,44,34)(30,47,35,48)(40,41,43,45)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.